Abstract
Skarn-type ore bodies formed at temperatures near 350 degrees C. Salinities suggest progressive dilution of an early high salinity magmatic fluid by less saline meteoric water. Salinities of the porphyry copper ore fluids reflect two distinct fluids of high and moderate salinity. Three distinct thermal fluids are associated with late-stage porphyry copper ore deposition. Maximum temperature isotherms. Localization of the largest ore concentrations was the result of rapid cooling of the ore-bearing fluids by convecting meteoric waters. For the skarn-type ore bodies, fluid flow was stratigraphically controlled within preferred stratigraphic units.--Modified journal abstract.
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